DisparaTimer is a timer to control the exposition of a photographic enlarger developed for smartphones with Android 9.0 or higher. It uses the WiFi AP created by a Raspeberry Pico W that also controls a 3.3V relay the enlarger is connected to. The Raspberry program is included in the "Raspberry" folder of the repository with the name "main.py". Check the "Manual" folder for a user manual with details about the connections needed.
It can be used as simple timer with 10 memories and f-stop based timing steps, and it can do also test strips with up to 9 f-stops based steps defined by the user.
Smartphone app is programmed with Java in Android Studio (Koala), Raspberry program is coded with micropython.